JY
OSTX

Jeff Yass’s OS Therapies Inc OSTX Stock Holding History

Jeff Yass’s Portfolio OSTX Stock Details OSTX Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q2 		$25.7K Sell
13,532
-435,205
-97% -$730K ﹤0.01% 12996
2026
Q1 		$633K Buy
+448,737
New +$637K ﹤0.01% 9060
2025
Q4 		– Sell
-14,961
Closed -$29.3K – 13828
2025
Q3 		$29.3K Buy
+14,961
New +$29.6K ﹤0.01% 11983

Other funds holding OSTX

Vanguard Capital Management
Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM
CM
CM Management Gulf Breeze, Florida $157M AUM 60.08% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.88T AUM 44.46% 1-Year Est. Return
HFS
Howard Financial Services Dallas, Texas $1B AUM 20.02% 1-Year Est. Return
BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
Vanguard Fiduciary Trust
Vanguard Fiduciary Trust Malvern, Pennsylvania $454B AUM
State Street
State Street Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return
Marshall Wace
Marshall Wace London, United Kingdom $127B AUM 46.06% 1-Year Est. Return
HighTower Advisors
HighTower Advisors Chicago, Illinois $103B AUM 28.65% 1-Year Est. Return
Northern Trust
Northern Trust Chicago, Illinois $860B AUM 41.15% 1-Year Est. Return

Jeff Yass's OSTX Position: Q2 2026 in Review

Jeff Yass reduced its OS Therapies Inc (OSTX) stake by 97% in Q2 2026, selling an estimated $730K and leaving 13,532 shares worth $25.7K. The position accounts for ﹤0.01% of the portfolio, ranked #12996.

Jeff Yass first reported a position in OSTX in Q3 2025 and has held it in 3 quarters since. The position peaked at $633K in Q1 2026. 29 funds tracked by Wall St. Rank hold OSTX as of Q2 2026.

  • Jeff Yass held 13,532 shares of OS Therapies Inc worth $25.7K as of Q2 2026.
  • Jeff Yass sold 435,205 OS Therapies Inc shares in Q2 2026, an estimated $730K.
  • OS Therapies Inc made up ﹤0.01% of Jeff Yass's portfolio in Q2 2026, its #12996 holding.
  • Jeff Yass first reported a position in OS Therapies Inc in Q3 2025 and has held it in 3 quarters since.
  • Jeff Yass's OS Therapies Inc position peaked at $633K in Q1 2026.
  • 29 funds tracked by Wall St. Rank held OS Therapies Inc as of Q2 2026.

Based on Susquehanna International Group's 13F filing for Q2 2026, filed 14 Aug 2026.